This map is based off the quite popular PC game Arma 2/3\ AKA Dayz. What you have to is survive in an abandoned City and scavenge for weapons and vehicles. The map itself has a huge city with docks and an airport and you can leave the City and hunt in the bush land.
The map is pretty big with lots of open areas perfect for combat, it also have some high structures and cliff sides to snipe the enemies.
Its teams of 2 and you hunt together to get as much kills to win. With your friend by your side its a lot easier to win the game and grab a lot of powerful weapons.